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-rw-r--r--Documentation/ABI/testing/sysfs-class-iommu-amd-iommu14
-rw-r--r--drivers/iommu/amd_iommu.c6
-rw-r--r--drivers/iommu/amd_iommu_init.c38
-rw-r--r--drivers/iommu/amd_iommu_types.h3
4 files changed, 61 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-iommu-amd-iommu b/Documentation/ABI/testing/sysfs-class-iommu-amd-iommu
new file mode 100644
index 000000000000..d6ba8e8a4a97
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-iommu-amd-iommu
@@ -0,0 +1,14 @@
+What: /sys/class/iommu/<iommu>/amd-iommu/cap
+Date: June 2014
+KernelVersion: 3.17
+Contact: Alex Williamson <alex.williamson@redhat.com>
+Description:
+ IOMMU capability header as documented in the AMD IOMMU
+ specification. Format: %x
+
+What: /sys/class/iommu/<iommu>/amd-iommu/features
+Date: June 2014
+KernelVersion: 3.17
+Contact: Alex Williamson <alex.williamson@redhat.com>
+Description:
+ Extended features of the IOMMU. Format: %llx
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 2e03c17c2499..c8f87a6c9b90 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -379,6 +379,9 @@ static int iommu_init_device(struct device *dev)
dev->archdata.iommu = dev_data;
+ iommu_device_link(amd_iommu_rlookup_table[dev_data->devid]->iommu_dev,
+ dev);
+
return 0;
}
@@ -403,6 +406,9 @@ static void iommu_uninit_device(struct device *dev)
if (!dev_data)
return;
+ iommu_device_unlink(amd_iommu_rlookup_table[dev_data->devid]->iommu_dev,
+ dev);
+
iommu_group_remove_device(dev);
/* Unlink from alias, it may change if another device is re-plugged */
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 0e08545d7298..3783e0b44df6 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -26,6 +26,7 @@
#include <linux/msi.h>
#include <linux/amd-iommu.h>
#include <linux/export.h>
+#include <linux/iommu.h>
#include <asm/pci-direct.h>
#include <asm/iommu.h>
#include <asm/gart.h>
@@ -1197,6 +1198,39 @@ static void init_iommu_perf_ctr(struct amd_iommu *iommu)
iommu->max_counters = (u8) ((val >> 7) & 0xf);
}
+static ssize_t amd_iommu_show_cap(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct amd_iommu *iommu = dev_get_drvdata(dev);
+ return sprintf(buf, "%x\n", iommu->cap);
+}
+static DEVICE_ATTR(cap, S_IRUGO, amd_iommu_show_cap, NULL);
+
+static ssize_t amd_iommu_show_features(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct amd_iommu *iommu = dev_get_drvdata(dev);
+ return sprintf(buf, "%llx\n", iommu->features);
+}
+static DEVICE_ATTR(features, S_IRUGO, amd_iommu_show_features, NULL);
+
+static struct attribute *amd_iommu_attrs[] = {
+ &dev_attr_cap.attr,
+ &dev_attr_features.attr,
+ NULL,
+};
+
+static struct attribute_group amd_iommu_group = {
+ .name = "amd-iommu",
+ .attrs = amd_iommu_attrs,
+};
+
+static const struct attribute_group *amd_iommu_groups[] = {
+ &amd_iommu_group,
+ NULL,
+};
static int iommu_init_pci(struct amd_iommu *iommu)
{
@@ -1297,6 +1331,10 @@ static int iommu_init_pci(struct amd_iommu *iommu)
amd_iommu_erratum_746_workaround(iommu);
+ iommu->iommu_dev = iommu_device_create(&iommu->dev->dev, iommu,
+ amd_iommu_groups, "ivhd%d",
+ iommu->index);
+
return pci_enable_device(iommu->dev);
}
diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h
index 7277a200d916..557a20e533f0 100644
--- a/drivers/iommu/amd_iommu_types.h
+++ b/drivers/iommu/amd_iommu_types.h
@@ -577,6 +577,9 @@ struct amd_iommu {
/* default dma_ops domain for that IOMMU */
struct dma_ops_domain *default_dom;
+ /* IOMMU sysfs device */
+ struct device *iommu_dev;
+
/*
* We can't rely on the BIOS to restore all values on reinit, so we
* need to stash them